Research on the Influence of RAP and Aged Asphalt on the Performance of Plant-mixed Hot Recycled Asphalt Mixture and Blended Asphalt
The overuse of resources and environmental destruction has led to the development of renewable research. Research on reclaimed asphalt pavement (RAP) has received widespread attention. In this study, reclaimed milling material from China’s Changyu Highway, which has been in operation for 15 years, was used to study the influence of aged asphalt content on the rheological properties, high-temperature performance, low-temperature performance and microscopic performance of blended asphalt and the impact of RAP content on the high-temperature stability, low-temperature crack resistance, water stability and resilience performance of recycled asphalt mixtures. The results show that the impact of aged asphalt content on the performance of base asphalt shares the same trend with the influence of RAP content on the performance of recycled asphalt mixture. With the admixing of aged asphalt, the blended asphalt is harder, increases in elasticity, and decreases in viscosity. The high-temperature performance improves, but the low-temperature performance worsens. With the addition of RAP, the water stability of the recycled asphalt mixtures improves, the high-temperature stability improves, and the low-temperature crack resistance worsens. This result is consistent with dynamic modulus test results. Overall, based on the micro and macro properties of blended asphalt and asphalt mixtures, a reasonable RAP content of 30% for road performance is given when the gradation is ATB-25.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/22145095
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Supplemental Notes:
- © 2021 Yuheng Chen et al. Published by Elsevier Ltd. Abstract reprinted with permission of Elsevier.
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Authors:
- Chen, Yuheng
- Chen, Zhiguo
- Xiang, Qian
- Qin, Weijun
- Yi, Junyan
- Publication Date: 2021-12
Language
- English
Media Info
- Media Type: Web
- Features: Figures; References; Tables;
- Pagination: e00722
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Serial:
- Case Studies in Construction Materials
- Volume: 15
- Issue Number: 0
- Publisher: Elsevier
- ISSN: 2214-5095
- Serial URL: http://www.sciencedirect.com/science/journal/22145095
Subject/Index Terms
- TRT Terms: Pavement performance; Reclaimed asphalt pavements; Recycled materials; Temperature
- Subject Areas: Construction; Highways; Materials;
Filing Info
- Accession Number: 01785172
- Record Type: Publication
- Files: TRIS
- Created Date: Oct 22 2021 9:02AM